Imagick::blackThresholdImage

    (PECL imagick 2, PECL imagick 3)

    Imagick::blackThresholdImage — Forces all pixels below the threshold into black

    Descrição

    publicImagick::blackThresholdImage(mixed$threshold): bool

    Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

    Parâmetros

    threshold

    The threshold below which everything turns black

    Valor Retornado

    Retorna true em caso de sucesso.

    Registro de Alterações

    VersãoDescrição
    PECL imagick 2.1.0 Now allows a string representing the color as a parameter. Previous versions allow only an ImagickPixel object.

    Exemplos

    Exemplo #1 Imagick::blackThresholdImage()

    <?php
    function blackThresholdImage($imagePath, $thresholdColor) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->blackthresholdimage($thresholdColor);
    header("Content-Type: image/jpg");
    echo     $imagick->getImageBlob();
    }

    ?>
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